Talk to a blind man — he knows, he 232wants the sense of sight, and willingly makes the proper allowances. But there are certain internal senses, which a man may want, and yet be wholly ignorant that he wants them. It is most unpleasant to converse with such persons on subjects of taste, philosophy, or religion. Of course, there is no reasoning with them: for they do not possess the facts, on which the reasoning must be grounded. Nothing is possible, but a naked dissent, which implies a sort of unsocial contempt; or, what a man of kind dispositions is very likely to fall into, a heartless tacit acquiescence, which borders too nearly on duplicity.